Document Type : Research Paper
Authors
1
No. 93, Floor 4
2
Department of horticultural sciences, Faculty of agriculture, University of Tabriz, Tabriz, Iran
3
Traditional Medicine Clinical Trial Research Center, Shahed University, Tehran, Iran
4
Medicinal plants research center, Shahed university, Tehran, Iran
10.22034/saps.2025.69425.3412
Abstract
Background and Objective: The study aimed to evaluate the crosstalk between grape color and antioxidant capacity through assessing some physio-biochemical properties besides color intensity to introduce more cost-effective method for determining high antioxidant capacity grapes.
Materials and Methods: The study was included harvested fruits from three cultivars (Fakhri, Shani and Ghermez Bidaneh) of regional vineyards of Qazvin province. The experiment was performed as complete block design in three replications. The experimental factors included total soluble solids (TSS), total acidity (TA), TSS/TA (flavor index), pectin, antioxidant compounds (ascorbic acid (vit C), total phenolic compounds, total flavonoids), antioxidant capacity (DPPH), antioxidant enzymes activities (POD, CAT and PPO) and PAL enzyme activity as well as color related parameters (RGB, a, L, b).
Results: The obtained data revealed that TSS, TSS/TA, total phenolic content, vit C, antioxidant capacity, pectin, antioxidant enzymes activities besides PAL were the highest in Shani cultivar while only TA was the highest in Ghermez Bidaneh. Color intensity was the maximum in Shani. Fakhri cultivar demonstrated the lowest antioxidant enzyme activities, PAL enzyme activity, vit C and TSS. All the results highlights that the highest relationship was observed between color intensity and antioxidant activity as seen in Shani.
Conclusion: Antioxidant activity and color parameters demonstrate close relation highlighting the cost-effective method for identifying grapes with high antioxidant capacity have more intense color.
Keywords: Physiological attributes, antioxidant enzymes, cultivar variation, color.
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